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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <boost/lexical_cast.hpp>
#include <drizzled/function/time/from_days.h>
#include <drizzled/error.h>
#include <drizzled/temporal.h>
#include <sstream>
#include <string>
namespace drizzled
{
/**
* Interpret the first argument as a Julian Day Number and fill
* our supplied temporal object.
*/
bool Item_func_from_days::get_temporal(Date &to)
{
assert(fixed);
/*
* We MUST call val_int() before checking null_value because, stupidly,
* a subselect does not evaluate it's scalar items as null until val_xxx()
* has been called. :(
*/
int64_t int_value= args[0]->val_int();
/* We return NULL from FROM_DAYS() only when supplied a NULL argument */
if (args[0]->null_value)
{
null_value= true;
return false;
}
/* OK, now try to convert from our integer */
if (! to.from_julian_day_number(int_value))
{
/* Bad input, throw an error */
std::string tmp(boost::lexical_cast<std::string>(int_value));
my_error(ER_ARGUMENT_OUT_OF_RANGE, MYF(ME_FATALERROR), tmp.c_str(), func_name());
return false;
}
return true;
}
} /* namespace drizzled */
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